How to Enable and Troubleshoot HTTP PUT and DELETE Requests in ASP.NET MVC with IIS?

HTTP PUT and DELETE in ASP.NET MVC with IIS

When developing an ASP.NET MVC application, it's crucial to enable HTTP PUT and DELETE requests for certain CRUD operations. While these methods work flawlessly in local environments, issues may arise when deploying the application to servers.

IIS Configuration for HTTP PUT and DELETE

For HTTP PUT and DELETE to function properly on IIS, additional configuration is necessary. Navigate to Handler Mappings within IIS Manager. Locate "ExtensionlessUrlHandler-Integrated-4.0," double-click it, and select "Request Restrictions..." On the Verbs tab, add both "DELETE" and "PUT."

Potential WebDAV Publisher Issue

In some cases, the WebDav Publisher feature can interfere with HTTP DELETE requests. If you're encountering problems, try disabling or removing the WebDav role or editing the system.webServer configuration:

<system.webServer>
  <modules>
    <remove name="WebDAVModule" />
  </modules>
  <handlers>
    <remove name="WebDAV" />
  </handlers>
</system.webServer>

HTTP DELETE Example with jQuery

To make an HTTP DELETE request using jQuery:

$.ajax({
  url: "http://example.com/dashboard/edit-site/103323/links/",
  cache: false,
  type: 'DELETE',
  data: { linkid: $(link).data("linkid") },
  beforeSend: function () {
    // UI actions
  },
  complete: function () {
    // UI actions
  },
  success: function (data) {
    // UI actions
  },
  error: function () {
    // UI actions
  }
});

This will generate a DELETE request with the appropriate request headers and data. By configuring IIS and optionally resolving WebDav issues, you can ensure that HTTP PUT and DELETE requests work seamlessly in your ASP.NET MVC applications.

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